Did you mindread Erlking? If so, on the other side of the room you can read the book he thought about (in Erlking's bookcase). Entering that room, the bookcase is on the right at the far back. Once you do that
to open a secret room, you can go up a level to kill a monster for a key, and then return to open the chest and learn the name.
When you know the name, taking the elevator up two floors will take you to Sassan, and the door after that is the 'point of no return'. Make sure you finish all quests in Broken Valley (you can wait to enter the quarry tower to rescue the people there) and on sentinel island (except for the quest where you need to be able to fly) and finish everything there you wish to do.
Welcome to the forum.
BTW, at the top left of each forum index page (such as
Help/Tips/Tricks), under the graphic and main forum text menu, there is a 'New Topic' button. If you didn't notice, the search feature defaults to posts in the past week; changing that to the past year (or whatever) should produce more results.
